ok so….. why did wake want HARROW so badly?

she let gideon-in-harrow’s-body go. she SAVED gideon-in-harrow’s-body’s life. but in the battle between Wake and the Canaan River Ghosts, she was hell bent on killing harrow and taking harrow’s body. she already had a lyctor’s body – Cytherea’s, which was made whole and then frozen by God, so it wasn’t suffering from turbo cancer anymore. so she had a body to walk around in and kill god with, already. so what did she need harrow’s body for specifically? it’s driving me insane